000  $anz n  2
000  $a주제어
001  $aKSH2004042945
005  $a20041206122327
008  $a041206 n azknnaabn          |a a|a    | 
150  $a지표수 처리업[地表水處理業]
450  $wr$i영어$asurface water treatment service
550  $a수질 오염[水質汚染]
550  $a지표수[地表水]